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L9908 数据表(PDF) 61 Page - STMicroelectronics |
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L9908 数据表(HTML) 61 Page - STMicroelectronics |
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61 / 152 page ![]() Symbol Parameter Test Condition Min Typ Max Unit Notes DRV_ls_on_dly LS Pre-driver switch ON total propagation delay (T_logic_+T_ls_on_dly) Rload = 2 kΩ INLn*0.5 to GLS_n*0.1 [n = 1,2,3] 170 - 400 ns - DRV_ls_off_dly LS Pre-driver switch OFF total propagation delay (T_logic_+T_ls_off_dly) Rload = 2 kΩ INLn*0.5 to GLS_n*0.9 [n = 1,2,3] 170 - 400 ns - DRV_on_dly_match Pre-drivers switch ON propagation delay matching (phase to phase) - 0 - 75 ns - DRV_off_dly_match Pre-drivers switch OFF propagation delay matching (phase to phase) - 0 - 75 ns - DRV_hs_trise HS Pre-driver rise time Cload = 33 nF GHS_n 1 V to 7 V SHS_n = 0 V [n = 1,2,3] 50 - 300 ns - DRV_hs_tfall HS Pre-driver fall time Cload = 33 nF GHS_n 1 V to 7 V SHS_n = 0 V [n = 1,2,3] 50 - 300 ns - DRV_ls_trise LS Pre-driver rise time Cload = 33 nF GLS_n 1 V to 7 V [n = 1,2,3] 50 - 250 ns - DRV_ls_tfall LS Pre-driver fall time Cload = 33 nF GLS_n 1 V to 7 V [n = 1,2,3] 50 - 250 ns - DRV_on_dly_match Pre-drivers rise time matching (phase to phase) - 0 - 20 ns - DRV_on_dly_match Pre-drivers fall time matching (phase to phase) - 0 - 20 ns - 1. The maximum allowed frequency is retrieved from the maximum average allowed current consumption from VPRE: Where: N is the number of Ext. FETs and Qg is the FET`s gate charge. So that if for example Qg = 150 nC the maximum fpwm allowed is close to 60 kHz (being Iload_max = 55 mA). 2. This D.C. limitation shall be adopted to guarantee the minimum Vgs on HS FETs over the whole battery operative range. Note: All parameters are guaranteed, and tested, in the voltage ranges reported above in Table 5 unless otherwise specified. Where not specified the parametrical operating range equals the functional operating range. L9908 Functional description DS13546 - Rev 5 page 61/152 |
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